Yeah — I felt trapped. Which got worse since that day, but also some things have changed.

I do think one aspect of this process is that at least so far there is a lot of visible progress, i.e., the therapy is helping whether or not dad really wants to cooperate with it. It’s going to be a bit more of a problem when progress slows and his continuation with skilled therapy is dependent on his willingness to practice.

Oh dear, sometimes it is necessary to smash sth, but please take a pillow. It is easier to clean afterwards and cheaper. I speak from my own experience.
Here it is a good german song, maybe it will cheer you up a bit “Mark Forster: Sowieso”